5-day weather forecast for Johnston, Iowa
Today
53°
77°
Chance Thunderstorms
Saturday
63°
88°
Chance Thunderstorms
Sunday
70°
91°
Chance Thunderstorms
Monday
68°
82°
Chance Thunderstorms
Tuesday
59°
78°
Slight Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Des Moines, Iowa
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 6.6° | 6.5° |
| Average change in low temperature day-to-day | 7.5° | 6.9° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 44% | 61% |
| Chance of precip day after a dry day | 31% | 24% |
Weather forecast accuracy for Des Moines, Iowa
| The Weather Channel | 70.57% |
| Intellicast | 70.57% |
| National Weather Service | 70.25% |
| AccuWeather | 69.62% |
| Weather Underground | 67.72% |
| CustomWeather | 65.82% |
| NWS Digital Forecast | 62.99% |
| World Weather Online | 53.80% |
| Persistence | 41.33% |
| The Weather Channel | 70.72% |
| Intellicast | 70.64% |
| National Weather Service | 69.34% |
| NWS Digital Forecast | 66.71% |
| AccuWeather | 64.43% |
| CustomWeather | 62.77% |
| Persistence | 44.40% |
ForecastAdvisor Fact
On average, AccuWeather's high temperature forecasts for Des Moines were off by 4.19 degrees last year.